Local privilege escalation via insecure file permissions
Published Jun 4, 2025 · Updated Feb 26, 2026
Insecure file permissions in Acronis Cyber Protect Cloud Agent before build 40077 allow local users to gain elevated privileges on Windows. Acronis identifies incorrect default permissions but has not disclosed the affected file, its access-control settings, or the privileged operation that consumes it. Exploitation requires existing low-privileged local access and user interaction; successful abuse grants elevated host privileges.
Summary
What happened
Insecure file permissions in Acronis Cyber Protect Cloud Agent before build 40077 allow local users to gain elevated privileges on Windows. Acronis identifies incorrect default permissions but has not disclosed the affected file, its access-control settings, or the privileged operation that consumes it. Exploitation requires existing low-privileged local access and user interaction; successful abuse grants elevated host privileges.
The record
- CVE
- CVE-2025-48959
- Published
- Jun 4, 2025
- Updated
- Feb 26, 2026
- Vendor
- Acronis
- Product
- Acronis Cyber Protect Cloud Agent
- Classifications
- CWE-276, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 4, 2025CVE publishedPublication date reported by the CVE source.
- Feb 26, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=unspecified <40077
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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